Toothed wheel.



- H. W. ALBEN 15a. R. B WEAVER.

TTHED WHEEL.

APPLICAT1ON rn.w MAR. 3. 1ew.

1 .231,321 Patented June 26, 1917.

UNITED STATES PATENT OFFICE.

HERBERT W. ALBEN ANID ROBERT B. WEAVER, OF DLE'IROIT, MICHIGAN, ASSIGNOBS 'I'O THE TIMKEN-DETBOI'I. AXLE GOMIANY, OF DETROIT, MIOH'IGAN, A OOBPORA- TOO'IHED WHEEL.

l Speciflcation 01 Letters Patent.

Patented J une 26, 1917.

T 0 all wlwm t may ooncern 130 it kr wwn that we, HERBERT W. ALBEN anti ROBERT B. WEAVER, citizen s of the United Stutes, und residents 0f the city of Detroit, in the county of VVayne und State of Michigan, have inventecl a new and usw ful Improvement in Toothed WhE/31S, 015 Which the folloflving is a speeification."

This invention relates to built-up topgl1ecl Wheels, partic1ilurly war wneels havlng 11'011 o1 Steel centers und ronze rims, such as am used for wenn driving gea1ing for automabiles.

Th objects of the invention "am t0 secure a bronze toothed rim upon im iron 01 steel center so zus to overcome the tenolency of tl1e rin1 t0 distort when hea.ted by the friction 0f the driving worm and so :;s to be securely held under all conditions f use.

The invention consists in cutting a series 0f narrow shalluw splines all. the way around fihe intern al circumference 0f the tootlxecl rlm, form1ng a series 0:f internal teetl1, ancl butting grooves in the peripheral edge of the center forming teeth which malte With said splines. The inventin further donsists in shrinking 01 pressi1w the rim 011 t0 che C611 ter Witl1 the splines fltting in be grooves.

The inventinn further consists in securing the rim on the oenter by xneans of a. 1ing 01' a pair 0f rings, euch 0f which is rivetedto the side 0f the rim 01 center so as t0 lap fl1e ends of' th splines und grooves, und prefieni; sidewise displacement 0f lzl1e 1'i111 011 tl1e fcen ter. The -invention further consists i;'1 the details of construetion of tl1e rim und ;'3enter as hereinafter described, 1ezference being had to tl1e accompanying clrawings; (hat is claimed as the invention is set fortlg' in the up ended cla.ims. 1/

n the drawings, in whieh tl1e Same refe1 e nce cl1umcters' deslgn'ate the Same" pmts in each view,

Figure 1 is a side view 0f a wormgear wheel embodying the invention, pzu't of the seuuxing 1ing l eing broken awzmy to disclosa the arrungement of mnting' splines und grooves;

line 2 -2 in Fig 1.

Warm gear ing which transmits mach power becomes heated from tl1e con siclerable s1iding friction constantly occurring be tween the Worn'1 and the Wl1gel. The'expan Sinn of' Ehe; rim by the heaf/ generatacl is so mach greater than tl1e expansion of the center filmt if the 1im is bolted t0 the center in the usua1 way, the bolts distort the -rim and the gearing does not run as smoothly and quietly a.s is desired for automobile gearing.

We have found filmt by makingjhe rim of substa.ntially the same diameter and shape around its entire inner perimter and across its entire immer face, the efi'ect of hexting it is uniform expansion around. tl1e entire rim; and 'if the rim is equally free 130 expand everywhere therg is 110 distortion caused thereby.

In the ge2u shown in the drawings, the rim 11 is made o fbronm ancl provided with wenn wheel teetl1 'li2 .spzxced around its outer circumference. Upon the inner cylindrical face Of Elle, rim 11 is formed a series 0f paral- 181 splines 0r shallow ribs 18 having parallel sicle faces spacecl around its entire erimete'r. Preferubly-the splines extend a.l -the wzly across the inner face of the Tim, ns shown in the clrawing, but it is not essenbiga] that they' shall e::-:ten all the way aicross the face. The center 14 is cast or'malleable iron wrought iron 01 steel, and is provided with a hub 15 01' other means 0f mounting it for rotation. The cylindrical eircumference Qf the center 14 is formed witl1 a series of parallel sided. grooves 16 upon it inating with the ribs li3 012 thwrim. Preferably the rim is heauecl und slipfied OI1 lille, center a nd as it contracts tl1e ribs 13 slide radially in the grooves unbil tlu; Ifim l1ugs the center uniformly all the Way around it. Heating the rim is nol: essential, as it muy be pressed. 0.n C0ld.

A pair of rings 17 is riveted ox1e to each side of the center with the 01 1ter edges 0f eac h ring lapping the inner edge 0f t he rim opposite the encls of filme ribs 13, thereb-y preventing sidewise displacement 01? the r.im und. center but permitting radial expansion of the 1im away from the center. Where the ribs und grooves d.o not extend 311 the wa 100 across the rim zmd center, only 0ne ring 1 is necessnry. A fiange oh the center or rim m'ay be used inslead of one of the rings 17, if preferred.

The invention is not restricted tb warm 105 igearsnorto the exact slmpe und arrangement of the ri"m and eencer shown in the drawings.

We claim the following as nur invention: 1;. A composite 'Wheel comprising a rim having a series 0'f parallel internal teeth hv- 110 

